import { Optional } from "../lang-utils/core";
import { Option } from "../lang-utils/rust-lang-utils";
import { Counter } from "./counter";
export interface State {
    runtimeStatus: LifecycleStage;
    startTime: number;
    stopTime: number;
}
export declare type TimerTickFn = (timer: Timer) => void;
declare type LifecycleStage = "created_not_started" | "running" | "stopped";
export interface Timer {
    readonly name: string;
    readonly delayMs: number;
    readonly durationMs: number;
    readonly isStopped: boolean;
    readonly isRunning: boolean;
    readonly isCreatedAndNotStarted: boolean;
    readonly state: State;
    counter?: Counter;
    getOnStopFn: () => Option<TimerTickFn>;
    setOnStopFn: (fn: Optional<TimerTickFn>) => void;
    getOnStartFn: () => Option<TimerTickFn>;
    setOnStartFn: (fn: Optional<TimerTickFn>) => void;
    getOnTickFn: () => Option<TimerTickFn>;
    setOnTickFn: (fn: Optional<TimerTickFn>) => void;
    startTicking: () => this;
    stopTicking: () => this;
    toString: () => string;
}
export declare const TimerErrors: {
    CantStart_AlreadyRunning: Error;
    CantStop_NotStarted: Error;
    CantStart_AlreadyStopped: Error;
    CantStop_AlreadyStopped: Error;
};
export {};